Have you guys read Championship Fighting by Jack Dempsey?

Hello,

I am reading Jack Dempsey's book on prize fighting. There he discusses the technique for a knock-out jolt.
The formula is this

1.Set body weight in explosive motion
2.Form a power-line with the punching arm
3. Convey the moving body-weight by exploding against your opponent.

The problem for me is that he suggests no use of the rear (right) leg in his falling step:

However when I look at examples of fighters with a solid jab like Cotto and SRL I see somewhat different technique: they clearly transfer weight on the rear leg AFTER the step with the left, then push hard with the rear leg

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Also, watching Jack Dempsey's fights, I cannot find any even slightest resemblance of the technique he describes. ANybody can help with this!

 

Some good quality posts in this thread, from you and Johnstown.

I think that Cotto used his rear leg to generate more power, thus resulting in the knockdown. Your gif of Leonard is not very clear, maybe he used the rear leg to move around while jabbing since he moves alot.

The idea behind the front step is to generate more power for your jab and to mvoe forward I believe.

 

Thanks for your reply!

I really want to understand this technique, so to avoid misunderstanding, here is roughly how I used to practice the move over the last 3-4 months:

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Unfortunately, I did not have a chance to apply against a heavy bag, but I tried once on a wooden plate - it got broken pretty easily